Corynoneura hortonensis Fu & Saether 2012, sp. n.

• Main Authors: Fu, Yue, Saether, Ole A.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2012
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Chironomidae; Corynoneura; Corynoneura hortonensis; Canada; Horton River; Northwest Territories
• Online Access: https://zenodo.org/record/5258043; https://doi.org/10.5281/zenodo.5258043

Corynoneura hortonensis sp. n. (Figs 16 A–G) Type material. Holotype male, CANADA: Northwest Territories, Horton River (6921'N, 12649.8'W), 4.vii.2000, Bohdan Bilyj (CNC). Paratypes: 4 males, 1 female, as holotype (ZMBN). Etymology. Named after the type locality. Diagnostic characters. The male is similar to C. kedrovaya Makarchenko et Makarchenko in the shape of the inferior volsella and gonostylus, but the two species can easily be separated as the tergite IX of C. kedrovaya has 4– 6 long setae, the phallapodeme is strongly curved and the joint with the sternapodeme is placed pre–laterally, while in C. hortonensis tergite IX of the male is without long setae, the phallapodeme is slightly curved and placed in a caudal position of the sternapodeme. The male is also similar to C. sundukovi Makarchenko et Makarchenko in the shape of the inferior volsella and sternapodeme, but the two species can easily be separated as the superior volsellae of C. sundukovi are large with almost right-angled corner, while in C. hortonensis the superior volsellae are small. Genitalia of female very simple, without any long setae, coxosternapodeme with only 1 lateral lamella. Male (n = 3–5) Total length 0.96–0.98, 0.97 mm. Wing length 0.66–0.74, 0.70 mm. Total length/wing length 1.3–1.5, 1.4. Wing length /profemur length 2.8. Coloration. Head brown; thorax and legs brown; abdominal tergites I–VI yellow, VII–IX brown. Head. Eyes bare. Antennae in all specimens broken. Tentorium 110–120, 114 µm long, 11–15, 13 µm wide; stipes 41 µm long, 3 µm wide. Clypeus with 5–7, 6 setae. Lengths of palpomeres (in µm): 6–8, 7; 10–12, 11; 12– 19, 17; 21–24, 22; 51–55, 53. Palpomere 5/3 ratio 2.1–2.9, 2.4. Thorax. Antepronotals absent. Dorsocentrals 6–7, prealars 2. Scutellum with 2 setae. Wing (Fig. 16 A). VR 3.6–3.9, 3.7. Cu/wing length 0.56–0.60, 0.58; C length 326–358, 341 µm long; Cu 420– 432, 426 µm long; wing width/wing length: 0.44–0.46, 0.45; costa with 6–8, 7 setae. Legs. Fore trochanter with dorsal keel. Spur of fore tibia 16–20, 18 µm ...